scholarly journals Genetic monitoring of brackish-water populations: the Mediterranean toothcarp Aphanius fasciatus (Cyprinodontidae) as a model

2002 ◽  
Vol 235 ◽  
pp. 257-262 ◽  
Author(s):  
F Maltagliati
Keyword(s):  
Brackish Water ◽  
Genetic Monitoring ◽  
Aphanius Fasciatus ◽  
The Mediterranean

scholarly journals Evaluation of environmental impact on natural populations of the Mediterranean killifish Aphanius fasciatus by quantitative RNA biomarkers

2010 ◽  
Vol 70 (3-4) ◽  
pp. 327-333 ◽  
Author(s):  
Kaouthar Kessabi ◽  
Anna Navarro ◽  
Marta Casado ◽  
Khaled Saïd ◽  
Imed Messaoudi ◽  
...  
Keyword(s):  
Environmental Impact ◽  
Natural Populations ◽  
Aphanius Fasciatus ◽  
The Mediterranean ◽  
Rna Biomarkers

scholarly journals Tethysbaena ledoyeri n. sp., a new thermosbaenacean species (Thermosbaenacea) from the Port-Miou karstic aquifer in southern France

Crustaceana ◽  
2020 ◽  
Vol 93 (7) ◽  
pp. 819-841
Author(s):  
H. P. Wagner ◽  
P. Chevaldonné
Keyword(s):  
New Species ◽  
Mediterranean Sea ◽  
Brackish Water ◽  
New Taxon ◽  
Karstic Aquifer ◽  
Southern France ◽  
The Mediterranean ◽  
A New Species

Abstract A new species of the thermosbaenacean genus Tethysbaena Wagner,1994 is described as T. ledoyeri n. sp. Together with an as yet undescribed amphipod (Niphargus sp.) it is an inhabitant of the brackish water of an aquifer that flows through the Basse-Provence Urgonian karstic system and reaches the Mediterranean Sea, 15 km east of Marseille, in the “Calanques” coast. The new taxon, being part of the T. argentarii-group, is compared with its closest allies in this group. Preliminary DNA data obtained from two specimens of the new species provide confirmation of its close ties to T. argentarii but also to T. scabra, the two geographically closest described species.

Analysis of meristic and mitochondrial DNA variation in Syngnathus abaster (Teleostea: Syngnathidae) from two western Mediterranean lagoons

Biologia ◽  
2011 ◽  
Vol 66 (6) ◽  
Author(s):  
Hajer Ben Alaya ◽  
Daria Sanna ◽  
Marco Casu ◽  
Francesca Biagi ◽  
Paolo Francalacci ◽  
...  
Keyword(s):  
Mitochondrial Dna ◽  
Brackish Water ◽  
Morphological Differentiation ◽  
Western Mediterranean ◽  
Genetic Structuring ◽  
Long Distance ◽  
Meristic Characters ◽  
Evolutionary Forces ◽  
Mediterranean Lagoons ◽  
The Mediterranean

AbstractSyngnathus abaster is a euryhaline pipefish distributed in the Mediterranean, Black Sea, and the north-eastern Atlantic. Although its populations are characterised by high morphological plasticity, neither congruent information about the morphological differentiation of S. abaster populations from the Mediterranean lagoons is available, nor population genetic surveys have been so far performed. In this context, the aims of our study were as follow: i) to describe the variation at nine meristic characters of S. abaster from two western Mediterranean brackish-water areas: the Tunis north lagoon (Tunisia) and the Mauguio lagoon (France); ii) to analyse sequences of four mitochondrial DNA regions in order to evaluate the occurrence of genetic variation between the two areas, if any. The morphological survey revealed a subdivision into two distinct groups: the first included the Tunisian specimens, the second the French ones. Genetic analysis evidenced the occurrence of a sharp genetic structuring with high levels of genetic differentiation between Tunisian and French S. abaster populations. Results suggest that the evolutionary forces driven by the different biogeographical and ecological conditions of the two Mediterranean brackish-water areas have boosted the morphological and genetic divergence of the populations here analysed. The scarce potential of long-distance dispersal of S. abaster may have also enhanced the divergence retrieved.

scholarly journals Tracing groundwater salinization processes in coastal aquifers: a hydrogeochemical and isotopic approach in Na-Cl brackish waters of north-western Sardinia, Italy

2013 ◽  
Vol 10 (1) ◽  
pp. 1041-1070 ◽  
Author(s):  
G. Mongelli ◽  
S. Monni ◽  
G. Oggiano ◽  
M. Paternoster ◽  
R. Sinisi
Keyword(s):  
Coastal Aquifers ◽  
Brackish Water ◽  
Meteoric Water ◽  
Mediterranean Area ◽  
Marine Water ◽  
Water Line ◽  
Brackish Waters ◽  
Water Intrusion ◽  
Meteoric Water Line ◽  
The Mediterranean

Abstract. In the Mediterranean area the demand of good quality water is often threatened by salinization, especially in coastal areas. The salinization is the result of concomitant processes due to both marine water intrusion and rock-water interaction, which in some cases are hardly distinguishable. In northwestern Sardinia, in the Nurra area, salinization due to marine water intrusion has been recently evidenced as consequence of bore hole exploitation. However, the geology of the Nurra records a long history from Paleozoic to Quaternary, resulting in relative structural complexity and in a wide variety of lithologies, including Triassic evaporites. To elucidate the origin of the saline component in the Nurra aquifer, may furnish a useful and more general model for the salinization processes in the Mediterranean area, where the occurrence of evaporitic rocks in coastal aquifers is a common feature. In addition, due to intensive human activities and recent climatic changes, the Nurra has become vulnerable to desertification and, similarly to other Mediterranean islands, surface-water resources can periodically suffer from drastic shortage. With this in mind we report new data, regarding brackish waters of Na-Cl type of the Nurra, including major ions and selected trace elements (B, Br, I and Sr) and isotopic data, including δ18O, δD in water, and δ34S and δ18O in dissolved sulphate. To better depict the origin of the salinity we also analyzed a set of Nurra Triassic evaporites for mineralogical and isotopic composition. The brackish waters have Cl contents up to 2025 mg L−1 and the ratios between dissolved ions and chlorine, with the exception of the Br/Cl ratio, are not those expected on the basis of a simple mixing between rain water and seawater. The δ18O and δD data indicate that most of the waters are within the Regional Meteoric Water Line and the Global Meteoric Water Line supporting the idea that they are meteoric in origin. A relevant consequence of the meteoric origin of the Nurra Na-Cl type water is that the Br/Cl ratio, extensively used to assess the origin of salinity in fresh water, should be used with care also in near coastal carbonate aquifers. Overall, and consistent with the geology and the lithological features of the study area, δ34S and δ18O in dissolved sulphate suggest that water-rock interaction is the responsible for the Nurra Na-Cl brackish water composition. Evaporites dissolution also explain the high chlorine contents since halite has been detected in the gypsum levels. Finally, the Nurra Na-Cl brackish water are undersaturated with respect to the more soluble salts involving, in a climate evolving toward semi-arid conditions, that the salinization process could dramatically intensify in the near future.

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